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.teacher-history__list{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:2px}.teacher-history__row-btn{display:flex;width:100%;align-items:center;justify-content:space-between;padding:6px 8px;border:0;border-radius:4px;background:transparent;cursor:pointer;font-size:12px;text-align:left}.teacher-history__row-btn:hover{background:var(--teacher-surface, rgba(0, 0, 0, .04))}.teacher-history__row-btn.is-selected{background:var(--teacher-surface-deep, rgba(0, 0, 0, .08));font-weight:600}.teacher-history__title{white-space:nowrap;overflow:hidden;text-overflow:ellipsis;flex:1 1 auto}.teacher-history__age{font-size:10px;color:var(--teacher-ink-soft, rgba(0, 0, 0, .5));margin-left:8px;flex:0 0 auto}.teacher-chat-body.teacher-chat-body--single{display:flex;flex-direction:column;flex:1 1 auto;min-height:0}@media(max-width:640px){.teacher-grid.is-two-col,.teacher-grid.is-three-col{grid-template-columns:1fr}.teacher-picker__select{max-width:calc(100vw - 48px)}.teacher-side-stack{order:-1}.teacher-rail--right{order:1}.teacher-rail-tabs{position:sticky;bottom:0;background:var(--teacher-bg, #f2ebe2)}}.teacher-workbench .teacher-pill--button{border:0;background:var(--teacher-accent-soft);color:var(--teacher-accent);cursor:pointer;font-weight:600;letter-spacing:0;font-size:11px;padding:4px 10px;border-radius:9999px;transition:background-color .12s,color .12s}.teacher-workbench .teacher-pill--button:hover{background:var(--teacher-accent);color:#fff}.teacher-workbench .teacher-conversation-list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:6px}.teacher-workbench .teacher-conversation-row{display:flex;align-items:stretch;gap:4px;border-radius:6px;background:transparent;transition:background-color .1s}.teacher-workbench .teacher-conversation-row:hover{background:var(--teacher-surface-muted)}.teacher-workbench .teacher-conversation-row.is-active{background:var(--teacher-accent-soft)}.teacher-workbench .teacher-conversation-row.is-active .teacher-conversation-row__title{color:var(--teacher-accent)}.teacher-workbench .teacher-conversation-row__main{flex:1;min-width:0;border:0;background:transparent;text-align:left;cursor:pointer;padding:8px 10px;display:flex;flex-direction:column;gap:3px;border-radius:6px 0 0 6px}.teacher-workbench .teacher-conversation-row__main:focus-visible{outline:2px solid var(--teacher-accent);outline-offset:-2px}.teacher-workbench .teacher-conversation-row__title-row{display:flex;align-items:baseline;justify-content:space-between;gap:8px}.teacher-workbench .teacher-conversation-row__title{font-size:12.5px;font-weight:600;color:var(--teacher-text);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;min-width:0}.teacher-workbench .teacher-conversation-row__agent{flex-shrink:0;font-size:9px;font-weight:700;text-transform:uppercase;letter-spacing:.04em;color:var(--teacher-muted);background:var(--teacher-surface-muted);padding:1px 6px;border-radius:4px}.teacher-workbench .teacher-conversation-row__preview{font-size:11.5px;color:var(--teacher-muted);line-height:1.35;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}.teacher-workbench .teacher-conversation-row__meta{display:flex;justify-content:space-between;gap:8px;font-size:10.5px;color:var(--teacher-muted)}.teacher-workbench .teacher-conversation-row__delete{flex-shrink:0;width:26px;border:0;background:transparent;color:var(--teacher-muted);cursor:pointer;font-size:16px;line-height:1;padding:0;opacity:0;transition:opacity .12s,color .12s;border-radius:0 6px 6px 0}.teacher-workbench .teacher-conversation-row:hover .teacher-conversation-row__delete,.teacher-workbench .teacher-conversation-row:focus-within .teacher-conversation-row__delete{opacity:1}.teacher-workbench .teacher-conversation-row__delete:hover{color:var(--teacher-danger)}.teacher-workbench .teacher-plan-pickbtn{border:0;background:transparent;color:var(--teacher-muted);cursor:pointer;font-size:11px;font-weight:500;padding:4px 10px;margin-left:4px;border-radius:9999px;transition:background-color .12s,color .12s}.teacher-workbench .teacher-plan-pickbtn:hover{background:var(--teacher-accent-soft);color:var(--teacher-accent)}.teacher-workbench .teacher-plan-picker-backdrop{position:fixed;top:0;right:0;bottom:0;left:0;background:#0f172a73;z-index:60;display:flex;align-items:center;justify-content:center}.teacher-workbench .teacher-plan-picker-modal{width:min(520px,calc(100vw - 32px));max-height:min(72vh,600px);background:var(--teacher-surface);border-radius:10px;box-shadow:0 12px 40px #0f172a40;display:flex;flex-direction:column}.teacher-workbench .teacher-plan-picker-header{display:flex;align-items:center;justify-content:space-between;padding:14px 16px;border-bottom:1px solid var(--teacher-border)}.teacher-workbench .teacher-plan-picker-header h3{margin:0;font-size:14px;font-weight:700}.teacher-workbench .teacher-plan-picker-header button{background:transparent;border:0;font-size:22px;color:var(--teacher-muted);cursor:pointer;line-height:1}.teacher-workbench .teacher-plan-picker-body{flex:1;overflow-y:auto;padding:8px 0}.teacher-workbench .teacher-plan-picker-body ul{list-style:none;margin:0;padding:0}.teacher-workbench .teacher-plan-picker-empty,.teacher-workbench .teacher-plan-picker-error{padding:12px 16px;font-size:12px;color:var(--teacher-muted);font-style:italic}.teacher-workbench .teacher-plan-picker-error{color:var(--teacher-danger);font-style:normal}.teacher-workbench .teacher-plan-picker-row{display:grid;grid-template-columns:70px 1fr auto;align-items:baseline;gap:10px;width:100%;padding:10px 16px;border:0;background:transparent;text-align:left;cursor:pointer;font-size:13px;color:var(--teacher-text);transition:background-color .1s}.teacher-workbench .teacher-plan-picker-row:hover{background:var(--teacher-surface-muted)}.teacher-workbench .teacher-plan-picker-row:disabled{opacity:.5;cursor:default}.teacher-workbench .teacher-plan-picker-row .week{font-family:ui-monospace,monospace;font-weight:700;color:var(--teacher-accent)}.teacher-workbench .teacher-plan-picker-row .topic{color:var(--teacher-text)}.teacher-workbench .teacher-plan-picker-row .filename{font-family:ui-monospace,monospace;font-size:10px;color:var(--teacher-muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:180px}